Charles baeceler



(Model.)

0. BAEOHLER.

METHOD OF CASTING STEREOTYPE PLATES.

No. 278,652. Patented May 29,1883.

CHARLES BAEGHLER, OF PORTLAND, OREGON.

METHOD OF YCASTI'NMG SPECIFICATION forming-part of Letters 'STERE'OTYPE-PLATES.

Patent No. 278,652, dated May 29, 1883.

Application filed February 1882. (Model) To alt whom it may concern Bent known that I, CHARLES BAEGHLER,

of Portland, in the county of 'Multnomah, in

the State of Oregon, have invented a new and useful Method of Making Stereotype or'Electrotype Blocks, wherein a core of wood or other material than the metal composing said blocks is completely enveloped by said metal, in the manner described in the subjoined specifica- .tion.

There areseveral methods of makin g wooden or other cores in or througha stereotype or electrotype block, whereby the cores or mountblocks are partially covered by the metal; but such cores or mount-blocks are constantly liable to'warp or swell from the water when forms are washed, and thereby become injured or useless. To avoid this difficulty is the object of the invention described herein, as also cheapness and special permanence and durability.

In Figure 1 is shown a perspective view of the supports a, used for setting the cores. Fig. 2 showsa side or longitudinal section,

.wherein are illustrated two of the supports in place while holding the core 0, the letter 1) representing the enveloping metal. Fig. 3 shows j a perspective of the whole arrangement, ready for casting, the supports a a a forming legs for y s the core 0, the dotted lines in this figure'showing the external. lines of the inclosing metal.

Fig. 4 shows a longitudinal section of an electrotype-plate treated and mounted similar to a stereotype-plate. In the several figures the plan is supposed to be square, after the manner of stereotype or electrotype blocks, and of the usual height of common type.

To prepare a core if for casting, I place the wood or other material overlthe casting-box and let it remain until it becomes sufliciently hot, having previously scratched'theends with a gage to indicate where the points of the supports a a a are to be set or driven, (there usually being three, as in Fig. 3,) a a a being the supports, 1) the inclosing metal, and c the core enveloped by said metal. r

When a stereotype is to be made, I place the matrixin casting-box in the usual manner, and setthe core in place bymeans of the supports aa a,two of which are usually in the lower endof the box and one at the upper end of the box. The inclosing side and pieces being in place between'the lid of the casting-box and the molten metal for the block'ready to pour, I cover the upper support a with stereotypers paste on the upper side only, to prevent it melting when the metal is poured against it, and so lose the support for the core. This proceeding is bad when the stereotype is made and the core covered at one operation.

When a stereotype or electrotype plate is already cast and is ready to be-mounted on a block another mode of working is followed. The electrotype is backed in the usual manner and straightened or planed, or, if a stereotype, is planed, as is usual, before mountin g. Then, laying the face against the bottom of the casting-box, the core is placed on the back, and strips of tin-foil put around the metal is poured.- Then some pieces, (two, three, or four,) of fusible metal, 0e, just thick enough to fill the space between the core and the lid of the casting-box, are placed on the back of the core, and the inclosing side and end bars set as in the first case, when the same is ready to receive the molten metal. If the stereotype or electrotype plates are old or long cast or corroded in any way, the edges around the outside of the core where they are to fuse with the new flow of metal are usually scraped bright and the tin-foil placed in the joint the r same as before. If the metals to be joined are similar in alloy it is not always necessary to use the tin-foil; but any of'the common acid fluxes may be used, and the result be the samea good joint.

- A block made in the above way is water and has other valuable features. These blocks also require less metal than those of partiallyinclosed cores with ends or sides open to dampness and in the case of stereotype and mounting, the inclosing metal may be of a commoner and cheaper sort, and barely thick enough to flow and cover the cores,fgreatly reducingtheexpense of such blocks.

claim-- proof, is not effectedby the air in any. manner,

electrotype plates previously made readyfor The improvement in the method of mailing the core, fuse the supporting devices, and form 'stereot-yp'eor electrotype blocks, consisting in acontinuous metal shell f'or thew'ooden core,

placingin the casting-box over the metal plate substantially as specified.

or matrix a wooden core, securing the core in CHARLES BAEOHLER. 5 place by supporting devices, substantially as Witnesses:

, describ,ed,made of easily-fused metal and then CHAS. B. TALBOT,

pouringin the molten metal so as to surround G. E. K-AYSER. 

